Are you going to block part of the window to the back porch, or is it a fairly low track, below the sill?
Are you going to move your shop to the spot where the old track was? I bet you could fill that space and still have to crowd it a bit. I can help you find free old kitchen cabinets for your stuff. Its the way I got mine.
You have lots of great places to mount lights for the track, high on those walls in the corner. I assume there are furring strips between the panelling and the exterior blocks, so a simple blue concrete screw will hold a lot of weight, much less a small lamp.